An organic dye in a polymer matrix - A search for a scintillator with long luminescent lifetime

作者：Lindvold L R^*; Beierholm A R; Andersen C E

来源：Radiation Measurements, 2010, 45(3-6): 615-617.

DOI：10.1016/j.radmeas.2009.11.021

• Fiber-coupled organic plastic scintillators
• Phosphorescence
• Stem effect

Fiber-coupled organic plastic scintillators enable dose rate monitoring in conjunction with pulsed radiation sources like linear medical accelerators. The accelerator, however, generates a significant amount of stray ionizing radiation. This radiation excites the long optical fiber cable (15-20 m), connecting the scintillator with the optical detector circuit, causing parasitic luminescence in the optical fiber. In this paper we propose a method for circumventing this problem. The method is based on the use of an organic scintillator with a long luminescent lifetime (room temperature phosphorescence). The long lifetime of the scintillator signal facilitates a temporal gating of the dose rate signal with respect to the parasitic luminescence from the optical fiber.

• 出版日期2010-7